Montes, R. published the artcileSpectrophotometric reaction-rate method for the determination of nitrite in waters with pyridine-2-aldehyde 2-pyridylhydrazone, Recommanded Product: 2-((2-(Pyridin-2-yl)hydrazono)methyl)pyridine, the publication is Talanta (1987), 34(12), 1021-6, database is CAplus and MEDLINE.
A method for the kinetic determination of submicrogram amounts of NO2– was developed, based on the bromate oxidation of pyridine-2-aldehyde 2-pyridylhydrazone in an acidic medium by NO2–. The reaction is monitored spectrophotometrically at 372 nm. A comparative study with HCl and HClO4 media shows that the anal. parameters are affected by the type of acid used. Within-day precision, based on 10 replicate determinations, was >0.011 μg/mL, which corresponds to 2.2-1.5% relative standard deviation at the concentrations examined Application of this method in the determination of NO2– in water is discussed. The recovery of NO2– from drinking waters was 90-117%, and the average relative standard deviation for NO2– determination is polluted river water was 3.2%. Large amounts of NO2– and NH4+ do not interfere. However, there is interference by Cu2+, Pd2+, and electroactive substances. Major advantages for the method are simplicity, absence of a reagent blank, and the wide determination range.
Talanta published new progress about 2215-33-0. 2215-33-0 belongs to pyridine-derivatives, auxiliary class Pyridine,Amine, name is 2-((2-(Pyridin-2-yl)hydrazono)methyl)pyridine, and the molecular formula is C11H10N4, Recommanded Product: 2-((2-(Pyridin-2-yl)hydrazono)methyl)pyridine.
Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem